犬实验性心肌梗死心脏的电子束CT三维重建

THREE-DIMENSIOANAL COMPUTERIZED RECONSTRUCTION OF MYOCARDIAL ISCHEMIC HEART FROM ELECTRON BEAM CT

研究电子束CT心肌梗死部位及形态的三维图象重建。结扎犬心冠状动脉左旋支及其分支，形成左室侧壁梗死区；经电子束CT增强容积扫描方式得到犬心断面，利用区域扩张法对梗死心肌进行自动分割；采用表面重建法完成犬心的三维重建。结果：清晰显示出了犬心的三维图象，并在三维图象上精确表示出了梗死的部位及形态。结论：在造影剂注射量与扫描起始时间适宜的条件下。

To reconstruct the 3-dimensioanal image of heart and the region of myocardial ischemia from 2-dimensioanal tomogram of electron beam CT (EBCT).METHODS The left circumflex branch of coronary artery were occluded to form the ischemia in the left ventricular lateral wall in six dogs. A series of heart section were obtained by using tile enhanced volume scanning of EBCT. The ischemic myocardium was recognized in program in terms of area expanding method. Surface reconstruction was applied to constitute 3-dimensioanal image of whole heart.RESULTS The reconstructed 3-dimensioanal image of heart was realistically displayed. The position and configuration of ischemic region was identified accurately and quantitatively.CONCLUSIONS The 3-dimensioanal reconstruction of myocardial ischemia can help physician to diagnose the focus of myocardial infarction more precisely than 2-dimensioanal image of EBCT.